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Diffstat (limited to 'runtime/doc/xxd.man')
| -rw-r--r-- | runtime/doc/xxd.man | 52 |
1 files changed, 28 insertions, 24 deletions
diff --git a/runtime/doc/xxd.man b/runtime/doc/xxd.man index 057c8e911b..7e1097fa99 100644 --- a/runtime/doc/xxd.man +++ b/runtime/doc/xxd.man @@ -1,4 +1,4 @@ -XXD(1) XXD(1) +XXD(1) General Commands Manual XXD(1) @@ -14,30 +14,29 @@ DESCRIPTION xxd creates a hex dump of a given file or standard input. It can also convert a hex dump back to its original binary form. Like uuencode(1) and uudecode(1) it allows the transmission of binary data in a `mail- - safe' ASCII representation, but has the advantage of decoding to stan- + safe' ASCII representation, but has the advantage of decoding to stan‐ dard output. Moreover, it can be used to perform binary file patching. OPTIONS - If no infile is given, standard input is read. If infile is specified - as a `-' character, then input is taken from standard input. If no + If no infile is given, standard input is read. If infile is specified + as a `-' character, then input is taken from standard input. If no outfile is given (or a `-' character is in its place), results are sent to standard output. - Note that a "lazy" parser is used which does not check for more than - the first option letter, unless the option is followed by a parameter. - Spaces between a single option letter and its parameter are optional. + Note that a "lazy" parser is used which does not check for more than + the first option letter, unless the option is followed by a parameter. + Spaces between a single option letter and its parameter are optional. Parameters to options can be specified in decimal, hexadecimal or octal notation. Thus -c8, -c 8, -c 010 and -cols 8 are all equivalent. - -a | -autoskip - toggle autoskip: A single '*' replaces nul-lines. Default off. + toggle autoskip: A single '*' replaces nul-lines. Default off. -b | -bits Switch to bits (binary digits) dump, rather than hexdump. This option writes octets as eight digits "1"s and "0"s instead of a normal hexadecimal dump. Each line is preceded by a line number - in hexadecimal and followed by an ascii (or ebcdic) representa- + in hexadecimal and followed by an ascii (or ebcdic) representa‐ tion. The command line switches -r, -p, -i do not work with this mode. @@ -50,25 +49,34 @@ OPTIONS to EBCDIC. This does not change the hexadecimal representation. The option is meaningless in combinations with -r, -p or -i. + -e Switch to little-endian hexdump. This option treats byte groups + as words in little-endian byte order. The default grouping of 4 + bytes may be changed using -g. This option only applies to hex‐ + dump, leaving the ASCII (or EBCDIC) representation unchanged. + The command line switches -r, -p, -i do not work with this mode. + -g bytes | -groupsize bytes separate the output of every <bytes> bytes (two hex characters - or eight bit-digits each) by a whitespace. Specify -g 0 to sup- - press grouping. <Bytes> defaults to 2 in normal mode and 1 in - bits mode. Grouping does not apply to postscript or include - style. + or eight bit-digits each) by a whitespace. Specify -g 0 to sup‐ + press grouping. <Bytes> defaults to 2 in normal mode, 4 in lit‐ + tle-endian mode and 1 in bits mode. Grouping does not apply to + postscript or include style. -h | -help print a summary of available commands and exit. No hex dumping is performed. -i | -include - output in C include file style. A complete static array defini- + output in C include file style. A complete static array defini‐ tion is written (named after the input file), unless xxd reads from stdin. -l len | -len len stop after writing <len> octets. + -o offset + add <offset> to the displayed file position. + -p | -ps | -postscript | -plain output in postscript continuous hexdump style. Also known as plain hexdump style. @@ -76,8 +84,8 @@ OPTIONS -r | -revert reverse operation: convert (or patch) hexdump into binary. If not writing to stdout, xxd writes into its output file without - truncating it. Use the combination -r -p to read plain hexadeci- - mal dumps without line number information and without a particu- + truncating it. Use the combination -r -p to read plain hexadeci‐ + mal dumps without line number information and without a particu‐ lar column layout. Additional Whitespace and line-breaks are allowed anywhere. @@ -101,7 +109,7 @@ OPTIONS CAVEATS xxd -r has some builtin magic while evaluating line number information. If the output file is seekable, then the linenumbers at the start of - each hexdump line may be out of order, lines may be missing, or over- + each hexdump line may be out of order, lines may be missing, or over‐ lapping. In these cases xxd will lseek(2) to the next position. If the output file is not seekable, only gaps are allowed, which will be filled by null-bytes. @@ -112,8 +120,8 @@ CAVEATS input line after reading enough columns of hexadecimal data (see option -c). This also means, that changes to the printable ascii (or ebcdic) columns are always ignored. Reverting a plain (or postscript) style - hexdump with xxd -r -p does not depend on the correct number of col- - umns. Here anything that looks like a pair of hex-digits is inter- + hexdump with xxd -r -p does not depend on the correct number of col‐ + umns. Here anything that looks like a pair of hex-digits is inter‐ preted. Note the difference between @@ -218,7 +226,6 @@ EXAMPLES % stty < /dev/term/b -echo -opost -isig -icanon min 1 % echo -n foo > /dev/term/b - RETURN VALUES The following error values are returned: @@ -256,7 +263,4 @@ AUTHOR <tony@sctnugen.ppp.gu.edu.au> <T.Nugent@sct.gu.edu.au> Small changes by Bram Moolenaar. Edited by Juergen Weigert. - - - Manual page for xxd August 1996 XXD(1) |